1 /*- 2 * Copyright (c) 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Sean Eric Fagan of Cygnus Support. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)sysconf.c 8.2 (Berkeley) 3/20/94 33 * $FreeBSD: src/lib/libc/gen/sysconf.c,v 1.26 2008/02/27 05:56:57 wollman Exp $ 34 * $DragonFly: src/lib/libc/gen/sysconf.c,v 1.5 2008/02/21 12:47:54 hasso Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/time.h> 39 #include <sys/sysctl.h> 40 #include <sys/resource.h> 41 #include <sys/socket.h> 42 43 #include <errno.h> 44 #include <limits.h> 45 #include <paths.h> 46 #include <pthread.h> /* we just need the limits */ 47 #include <time.h> 48 #include <unistd.h> 49 50 #include "../stdlib/atexit.h" 51 #include "../stdtime/tzfile.h" 52 53 #define _PATH_ZONEINFO TZDIR /* from tzfile.h */ 54 55 /* 56 * sysconf -- 57 * get configurable system variables. 58 * 59 * XXX 60 * POSIX 1003.1 (ISO/IEC 9945-1, 4.8.1.3) states that the variable values 61 * not change during the lifetime of the calling process. This would seem 62 * to require that any change to system limits kill all running processes. 63 * A workaround might be to cache the values when they are first retrieved 64 * and then simply return the cached value on subsequent calls. This is 65 * less useful than returning up-to-date values, however. 66 */ 67 long 68 sysconf(int name) 69 { 70 struct rlimit rl; 71 size_t len; 72 int mib[2], sverrno, value; 73 long lvalue, defaultresult; 74 const char *path; 75 76 defaultresult = -1; 77 78 switch (name) { 79 case _SC_ARG_MAX: 80 mib[0] = CTL_KERN; 81 mib[1] = KERN_ARGMAX; 82 break; 83 case _SC_CHILD_MAX: 84 if (getrlimit(RLIMIT_NPROC, &rl) != 0) 85 return (-1); 86 if (rl.rlim_cur == RLIM_INFINITY) 87 return (-1); 88 if (rl.rlim_cur > LONG_MAX) { 89 errno = EOVERFLOW; 90 return (-1); 91 } 92 return ((long)rl.rlim_cur); 93 case _SC_CLK_TCK: 94 return (CLK_TCK); 95 case _SC_NGROUPS_MAX: 96 mib[0] = CTL_KERN; 97 mib[1] = KERN_NGROUPS; 98 break; 99 case _SC_OPEN_MAX: 100 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 101 return (-1); 102 if (rl.rlim_cur == RLIM_INFINITY) 103 return (-1); 104 if (rl.rlim_cur > LONG_MAX) { 105 errno = EOVERFLOW; 106 return (-1); 107 } 108 return ((long)rl.rlim_cur); 109 case _SC_STREAM_MAX: 110 if (getrlimit(RLIMIT_NOFILE, &rl) != 0) 111 return (-1); 112 if (rl.rlim_cur == RLIM_INFINITY) 113 return (-1); 114 if (rl.rlim_cur > LONG_MAX) { 115 errno = EOVERFLOW; 116 return (-1); 117 } 118 /* 119 * struct __sFILE currently has a limitation that 120 * file descriptors must fit in a signed short. 121 * This doesn't precisely capture the letter of POSIX 122 * but approximates the spirit. 123 */ 124 if (rl.rlim_cur > SHRT_MAX) 125 return (SHRT_MAX); 126 127 return ((long)rl.rlim_cur); 128 case _SC_JOB_CONTROL: 129 return (_POSIX_JOB_CONTROL); 130 case _SC_SAVED_IDS: 131 /* XXX - must be 1 */ 132 mib[0] = CTL_KERN; 133 mib[1] = KERN_SAVED_IDS; 134 goto yesno; 135 case _SC_VERSION: 136 mib[0] = CTL_KERN; 137 mib[1] = KERN_POSIX1; 138 break; 139 case _SC_BC_BASE_MAX: 140 return (BC_BASE_MAX); 141 case _SC_BC_DIM_MAX: 142 return (BC_DIM_MAX); 143 case _SC_BC_SCALE_MAX: 144 return (BC_SCALE_MAX); 145 case _SC_BC_STRING_MAX: 146 return (BC_STRING_MAX); 147 case _SC_COLL_WEIGHTS_MAX: 148 return (COLL_WEIGHTS_MAX); 149 case _SC_EXPR_NEST_MAX: 150 return (EXPR_NEST_MAX); 151 case _SC_LINE_MAX: 152 return (LINE_MAX); 153 case _SC_RE_DUP_MAX: 154 return (RE_DUP_MAX); 155 case _SC_2_VERSION: 156 /* 157 * This is something of a lie, but it would be silly at 158 * this point to try to deduce this from the contents 159 * of the filesystem. 160 */ 161 return (_POSIX2_VERSION); 162 case _SC_2_C_BIND: 163 return (_POSIX2_C_BIND); 164 case _SC_2_C_DEV: 165 return (_POSIX2_C_DEV); 166 case _SC_2_CHAR_TERM: 167 return (_POSIX2_CHAR_TERM); 168 case _SC_2_FORT_DEV: 169 return (_POSIX2_FORT_DEV); 170 case _SC_2_FORT_RUN: 171 return (_POSIX2_FORT_RUN); 172 case _SC_2_LOCALEDEF: 173 return (_POSIX2_LOCALEDEF); 174 case _SC_2_SW_DEV: 175 return (_POSIX2_SW_DEV); 176 case _SC_2_UPE: 177 return (_POSIX2_UPE); 178 case _SC_TZNAME_MAX: 179 path = _PATH_ZONEINFO; 180 do_NAME_MAX: 181 sverrno = errno; 182 errno = 0; 183 lvalue = pathconf(path, _PC_NAME_MAX); 184 if (lvalue == -1 && errno != 0) 185 return (-1); 186 errno = sverrno; 187 return (lvalue); 188 189 case _SC_ASYNCHRONOUS_IO: 190 #if _POSIX_ASYNCHRONOUS_IO == 0 191 mib[0] = CTL_P1003_1B; 192 mib[1] = CTL_P1003_1B_ASYNCHRONOUS_IO; 193 break; 194 #else 195 return (_POSIX_ASYNCHRONOUS_IO); 196 #endif 197 case _SC_MAPPED_FILES: 198 return (_POSIX_MAPPED_FILES); 199 case _SC_MEMLOCK: 200 return (_POSIX_MEMLOCK); 201 case _SC_MEMLOCK_RANGE: 202 return (_POSIX_MEMLOCK_RANGE); 203 case _SC_MEMORY_PROTECTION: 204 return (_POSIX_MEMORY_PROTECTION); 205 case _SC_MESSAGE_PASSING: 206 #if _POSIX_MESSAGE_PASSING == 0 207 mib[0] = CTL_P1003_1B; 208 mib[1] = CTL_P1003_1B_MESSAGE_PASSING; 209 goto yesno; 210 #else 211 return (_POSIX_MESSAGE_PASSING); 212 #endif 213 case _SC_PRIORITIZED_IO: 214 #if _POSIX_PRIORITIZED_IO == 0 215 mib[0] = CTL_P1003_1B; 216 mib[1] = CTL_P1003_1B_PRIORITIZED_IO; 217 goto yesno; 218 #else 219 return (_POSIX_PRIORITIZED_IO); 220 #endif 221 case _SC_PRIORITY_SCHEDULING: 222 #if _POSIX_PRIORITY_SCHEDULING == 0 223 mib[0] = CTL_P1003_1B; 224 mib[1] = CTL_P1003_1B_PRIORITY_SCHEDULING; 225 goto yesno; 226 #else 227 return (_POSIX_PRIORITY_SCHEDULING); 228 #endif 229 case _SC_REALTIME_SIGNALS: 230 #if _POSIX_REALTIME_SIGNALS == 0 231 mib[0] = CTL_P1003_1B; 232 mib[1] = CTL_P1003_1B_REALTIME_SIGNALS; 233 goto yesno; 234 #else 235 return (_POSIX_REALTIME_SIGNALS); 236 #endif 237 case _SC_SEMAPHORES: 238 #if _POSIX_SEMAPHORES == 0 239 mib[0] = CTL_P1003_1B; 240 mib[1] = CTL_P1003_1B_SEMAPHORES; 241 goto yesno; 242 #else 243 return (_POSIX_SEMAPHORES); 244 #endif 245 case _SC_FSYNC: 246 return (_POSIX_FSYNC); 247 248 case _SC_SHARED_MEMORY_OBJECTS: 249 return (_POSIX_SHARED_MEMORY_OBJECTS); 250 case _SC_SYNCHRONIZED_IO: 251 #if _POSIX_SYNCHRONIZED_IO == 0 252 mib[0] = CTL_P1003_1B; 253 mib[1] = CTL_P1003_1B_SYNCHRONIZED_IO; 254 goto yesno; 255 #else 256 return (_POSIX_SYNCHRONIZED_IO); 257 #endif 258 case _SC_TIMERS: 259 #if _POSIX_TIMERS == 0 260 mib[0] = CTL_P1003_1B; 261 mib[1] = CTL_P1003_1B_TIMERS; 262 goto yesno; 263 #else 264 return (_POSIX_TIMERS); 265 #endif 266 case _SC_AIO_LISTIO_MAX: 267 mib[0] = CTL_P1003_1B; 268 mib[1] = CTL_P1003_1B_AIO_LISTIO_MAX; 269 break; 270 case _SC_AIO_MAX: 271 mib[0] = CTL_P1003_1B; 272 mib[1] = CTL_P1003_1B_AIO_MAX; 273 break; 274 case _SC_AIO_PRIO_DELTA_MAX: 275 mib[0] = CTL_P1003_1B; 276 mib[1] = CTL_P1003_1B_AIO_PRIO_DELTA_MAX; 277 break; 278 case _SC_DELAYTIMER_MAX: 279 mib[0] = CTL_P1003_1B; 280 mib[1] = CTL_P1003_1B_DELAYTIMER_MAX; 281 goto yesno; 282 case _SC_MQ_OPEN_MAX: 283 mib[0] = CTL_P1003_1B; 284 mib[1] = CTL_P1003_1B_MQ_OPEN_MAX; 285 goto yesno; 286 case _SC_PAGESIZE: 287 defaultresult = getpagesize(); 288 mib[0] = CTL_P1003_1B; 289 mib[1] = CTL_P1003_1B_PAGESIZE; 290 goto yesno; 291 case _SC_RTSIG_MAX: 292 mib[0] = CTL_P1003_1B; 293 mib[1] = CTL_P1003_1B_RTSIG_MAX; 294 goto yesno; 295 case _SC_SEM_NSEMS_MAX: 296 mib[0] = CTL_P1003_1B; 297 mib[1] = CTL_P1003_1B_SEM_NSEMS_MAX; 298 goto yesno; 299 case _SC_SEM_VALUE_MAX: 300 mib[0] = CTL_P1003_1B; 301 mib[1] = CTL_P1003_1B_SEM_VALUE_MAX; 302 goto yesno; 303 case _SC_SIGQUEUE_MAX: 304 mib[0] = CTL_P1003_1B; 305 mib[1] = CTL_P1003_1B_SIGQUEUE_MAX; 306 goto yesno; 307 case _SC_TIMER_MAX: 308 mib[0] = CTL_P1003_1B; 309 mib[1] = CTL_P1003_1B_TIMER_MAX; 310 yesno: 311 len = sizeof(value); 312 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 313 return (-1); 314 if (value == 0) 315 return (defaultresult); 316 return ((long)value); 317 318 case _SC_2_PBS: 319 case _SC_2_PBS_ACCOUNTING: 320 case _SC_2_PBS_CHECKPOINT: 321 case _SC_2_PBS_LOCATE: 322 case _SC_2_PBS_MESSAGE: 323 case _SC_2_PBS_TRACK: 324 #if _POSIX2_PBS == 0 325 #error "don't know how to determine _SC_2_PBS" 326 /* 327 * This probably requires digging through the filesystem 328 * to see if the appropriate package has been installed. 329 * Since we don't currently support this option at all, 330 * it's not worth the effort to write the code now. 331 * Figuring out which of the sub-options are supported 332 * would be even more difficult, so it's probably easier 333 * to always say ``no''. 334 */ 335 #else 336 return (_POSIX2_PBS); 337 #endif 338 case _SC_ADVISORY_INFO: 339 #if _POSIX_ADVISORY_INFO == 0 340 #error "_POSIX_ADVISORY_INFO" 341 #else 342 return (_POSIX_ADVISORY_INFO); 343 #endif 344 #if 0 345 case _SC_BARRIERS: 346 #if _POSIX_BARRIERS == 0 347 #error "_POSIX_BARRIERS" 348 #else 349 return (_POSIX_BARRIERS); 350 #endif 351 #endif 352 case _SC_CLOCK_SELECTION: 353 #if _POSIX_CLOCK_SELECTION == 0 354 #error "_POSIX_CLOCK_SELECTION" 355 #else 356 return (_POSIX_CLOCK_SELECTION); 357 #endif 358 case _SC_CPUTIME: 359 #if _POSIX_CPUTIME == 0 360 #error "_POSIX_CPUTIME" 361 #else 362 return (_POSIX_CPUTIME); 363 #endif 364 #ifdef notdef 365 case _SC_FILE_LOCKING: 366 /* 367 * XXX - The standard doesn't tell us how to define 368 * _POSIX_FILE_LOCKING, so we can't answer this one. 369 */ 370 #endif 371 #if _POSIX_THREAD_SAFE_FUNCTIONS > -1 372 case _SC_GETGR_R_SIZE_MAX: 373 case _SC_GETPW_R_SIZE_MAX: 374 #error "somebody needs to implement this" 375 #endif 376 case _SC_HOST_NAME_MAX: 377 return (MAXHOSTNAMELEN - 1); /* does not include \0 */ 378 case _SC_LOGIN_NAME_MAX: 379 return (MAXLOGNAME); 380 case _SC_MONOTONIC_CLOCK: 381 #if _POSIX_MONOTONIC_CLOCK == 0 382 #error "_POSIX_MONOTONIC_CLOCK" 383 #else 384 return (_POSIX_MONOTONIC_CLOCK); 385 #endif 386 #if _POSIX_MESSAGE_PASSING > -1 387 case _SC_MQ_PRIO_MAX: 388 return (MQ_PRIO_MAX); 389 #endif 390 case _SC_READER_WRITER_LOCKS: 391 return (_POSIX_READER_WRITER_LOCKS); 392 case _SC_REGEXP: 393 return (_POSIX_REGEXP); 394 case _SC_SHELL: 395 return (_POSIX_SHELL); 396 case _SC_SPAWN: 397 return (_POSIX_SPAWN); 398 #if 0 399 case _SC_SPIN_LOCKS: 400 return (_POSIX_SPIN_LOCKS); 401 #endif 402 case _SC_SPORADIC_SERVER: 403 #if _POSIX_SPORADIC_SERVER == 0 404 #error "_POSIX_SPORADIC_SERVER" 405 #else 406 return (_POSIX_SPORADIC_SERVER); 407 #endif 408 case _SC_THREAD_ATTR_STACKADDR: 409 return (_POSIX_THREAD_ATTR_STACKADDR); 410 case _SC_THREAD_ATTR_STACKSIZE: 411 return (_POSIX_THREAD_ATTR_STACKSIZE); 412 case _SC_THREAD_CPUTIME: 413 return (_POSIX_THREAD_CPUTIME); 414 case _SC_THREAD_DESTRUCTOR_ITERATIONS: 415 return (PTHREAD_DESTRUCTOR_ITERATIONS); 416 case _SC_THREAD_KEYS_MAX: 417 return (PTHREAD_KEYS_MAX); 418 case _SC_THREAD_PRIO_INHERIT: 419 return (_POSIX_THREAD_PRIO_INHERIT); 420 case _SC_THREAD_PRIO_PROTECT: 421 return (_POSIX_THREAD_PRIO_PROTECT); 422 case _SC_THREAD_PRIORITY_SCHEDULING: 423 return (_POSIX_THREAD_PRIORITY_SCHEDULING); 424 case _SC_THREAD_PROCESS_SHARED: 425 return (_POSIX_THREAD_PROCESS_SHARED); 426 case _SC_THREAD_SAFE_FUNCTIONS: 427 return (_POSIX_THREAD_SAFE_FUNCTIONS); 428 case _SC_THREAD_STACK_MIN: 429 return (PTHREAD_STACK_MIN); 430 case _SC_THREAD_THREADS_MAX: 431 return (PTHREAD_THREADS_MAX); /* XXX wrong type! */ 432 case _SC_TIMEOUTS: 433 return (_POSIX_TIMEOUTS); 434 case _SC_THREADS: 435 return (_POSIX_THREADS); 436 case _SC_TRACE: 437 #if _POSIX_TRACE == 0 438 #error "_POSIX_TRACE" 439 /* While you're implementing this, also do the ones below. */ 440 #else 441 return (_POSIX_TRACE); 442 #endif 443 #if _POSIX_TRACE > -1 444 case _SC_TRACE_EVENT_FILTER: 445 return (_POSIX_TRACE_EVENT_FILTER); 446 case _SC_TRACE_INHERIT: 447 return (_POSIX_TRACE_INHERIT); 448 case _SC_TRACE_LOG: 449 return (_POSIX_TRACE_LOG); 450 #endif 451 case _SC_TTY_NAME_MAX: 452 path = _PATH_DEV; 453 goto do_NAME_MAX; 454 case _SC_TYPED_MEMORY_OBJECTS: 455 #if _POSIX_TYPED_MEMORY_OBJECTS == 0 456 #error "_POSIX_TYPED_MEMORY_OBJECTS" 457 #else 458 return (_POSIX_TYPED_MEMORY_OBJECTS); 459 #endif 460 case _SC_V6_ILP32_OFF32: 461 #if _V6_ILP32_OFF32 == 0 462 if (sizeof(int) * CHAR_BIT == 32 && 463 sizeof(int) == sizeof(long) && 464 sizeof(long) == sizeof(void *) && 465 sizeof(void *) == sizeof(off_t)) 466 return 1; 467 else 468 return -1; 469 #else 470 return (_V6_ILP32_OFF32); 471 #endif 472 case _SC_V6_ILP32_OFFBIG: 473 #if _V6_ILP32_OFFBIG == 0 474 if (sizeof(int) * CHAR_BIT == 32 && 475 sizeof(int) == sizeof(long) && 476 sizeof(long) == sizeof(void *) && 477 sizeof(off_t) * CHAR_BIT >= 64) 478 return 1; 479 else 480 return -1; 481 #else 482 return (_V6_ILP32_OFFBIG); 483 #endif 484 case _SC_V6_LP64_OFF64: 485 #if _V6_LP64_OFF64 == 0 486 if (sizeof(int) * CHAR_BIT == 32 && 487 sizeof(long) * CHAR_BIT == 64 && 488 sizeof(long) == sizeof(void *) && 489 sizeof(void *) == sizeof(off_t)) 490 return 1; 491 else 492 return -1; 493 #else 494 return (_V6_LP64_OFF64); 495 #endif 496 case _SC_V6_LPBIG_OFFBIG: 497 #if _V6_LPBIG_OFFBIG == 0 498 if (sizeof(int) * CHAR_BIT >= 32 && 499 sizeof(long) * CHAR_BIT >= 64 && 500 sizeof(void *) * CHAR_BIT >= 64 && 501 sizeof(off_t) * CHAR_BIT >= 64) 502 return 1; 503 else 504 return -1; 505 #else 506 return (_V6_LPBIG_OFFBIG); 507 #endif 508 case _SC_ATEXIT_MAX: 509 return (ATEXIT_SIZE); 510 case _SC_IOV_MAX: 511 mib[0] = CTL_KERN; 512 mib[1] = KERN_IOV_MAX; 513 break; 514 case _SC_XOPEN_CRYPT: 515 return (_XOPEN_CRYPT); 516 case _SC_XOPEN_ENH_I18N: 517 return (_XOPEN_ENH_I18N); 518 case _SC_XOPEN_LEGACY: 519 return (_XOPEN_LEGACY); 520 case _SC_XOPEN_REALTIME: 521 #if _XOPEN_REALTIME == 0 522 sverrno = errno; 523 value = sysconf(_SC_ASYNCHRONOUS_IO) > 0 && 524 sysconf(_SC_MEMLOCK) > 0 && 525 sysconf(_SC_MEMLOCK_RANGE) > 0 && 526 sysconf(_SC_MESSAGE_PASSING) > 0 && 527 sysconf(_SC_PRIORITY_SCHEDULING) > 0 && 528 sysconf(_SC_REALTIME_SIGNALS) > 0 && 529 sysconf(_SC_SEMAPHORES) > 0 && 530 sysconf(_SC_SHARED_MEMORY_OBJECTS) > 0 && 531 sysconf(_SC_SYNCHRONIZED_IO) > 0 && 532 sysconf(_SC_TIMERS) > 0; 533 errno = sverrno; 534 if (value) 535 return (200112L); 536 else 537 return (-1); 538 #else 539 return (_XOPEN_REALTIME); 540 #endif 541 case _SC_XOPEN_REALTIME_THREADS: 542 #if _XOPEN_REALTIME_THREADS == 0 543 #error "_XOPEN_REALTIME_THREADS" 544 #else 545 return (_XOPEN_REALTIME_THREADS); 546 #endif 547 case _SC_XOPEN_SHM: 548 len = sizeof(lvalue); 549 sverrno = errno; 550 if (sysctlbyname("kern.ipc.shmmin", &lvalue, &len, NULL, 551 0) == -1) { 552 errno = sverrno; 553 return (-1); 554 } 555 errno = sverrno; 556 return (1); 557 case _SC_XOPEN_STREAMS: 558 return (_XOPEN_STREAMS); 559 case _SC_XOPEN_UNIX: 560 return (_XOPEN_UNIX); 561 #ifdef _XOPEN_VERSION 562 case _SC_XOPEN_VERSION: 563 return (_XOPEN_VERSION); 564 #endif 565 #ifdef _XOPEN_XCU_VERSION 566 case _SC_XOPEN_XCU_VERSION: 567 return (_XOPEN_XCU_VERSION); 568 #endif 569 case _SC_SYMLOOP_MAX: 570 return (MAXSYMLINKS); 571 case _SC_RAW_SOCKETS: 572 return (_POSIX_RAW_SOCKETS); 573 case _SC_IPV6: 574 #if _POSIX_IPV6 == 0 575 sverrno = errno; 576 value = socket(PF_INET6, SOCK_DGRAM, 0); 577 errno = sverrno; 578 if (value >= 0) { 579 close(value); 580 return (200112L); 581 } else 582 return (0); 583 #else 584 return (_POSIX_IPV6); 585 #endif 586 587 case _SC_NPROCESSORS_CONF: 588 case _SC_NPROCESSORS_ONLN: 589 mib[0] = CTL_HW; 590 mib[1] = HW_NCPU; 591 break; 592 593 #ifdef _SC_PHYS_PAGES 594 case _SC_PHYS_PAGES: 595 len = sizeof(lvalue); 596 if (sysctlbyname("hw.availpages", &lvalue, &len, NULL, 0) == -1) 597 return (-1); 598 return (lvalue); 599 #endif 600 601 default: 602 errno = EINVAL; 603 return (-1); 604 } 605 len = sizeof(value); 606 if (sysctl(mib, 2, &value, &len, NULL, 0) == -1) 607 value = -1; 608 return ((long)value); 609 } 610